I've noted from others previously that no one, except for two Russian scientists, want to bet $10,000 that global warming (climate change is the term used by the republicans) is occurring and is being exacerbated by man's activities. See:

The Pieser report mentioned to discredit the Oreskes artice in Nature was defective methodologically. See Tim Lambert's post(http://timlambert.org/2005/05/peiser/.) Here's the primer on how to talk to a climate change skeptic (http://gristmill.grist.org/skeptics)

Follow the money of the skeptics.... (http://www.motherjones.com/news/featurex/2005/05/exxon_chart.html)Lastly, Mother Jones' series on anthropogenic global warming (http://www.motherjones.com/news/featurex/2005/05/world_burns.htm) should be must reading...